Ideal bend contour trajectories for single-mode operation of low-loss overmoded 
waveguides

Koos, Christian; Poulton, Christopher G.; Zimmermann, Lars; Jacome, Lenin; Leuthold, Juerg; Freude, Wolfgang

doi:10.1109/LPT.2007.897294

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Ideal bend contour trajectories for single-mode operation of low-loss overmoded waveguides

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Poulton, Christopher G.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Koos, C., Poulton, C. G., Zimmermann, L., Jacome, L., Leuthold, J., & Freude, W. (2007). Ideal bend contour trajectories for single-mode operation of low-loss overmoded waveguides. IEEE PHOTONICS TECHNOLOGY LETTERS, 19(9-12), 819-821. doi:10.1109/LPT.2007.897294.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6D3A-E

Abstract

Bend designs for single-mode operation of low-loss overmoded waveguides are presented. A class of contour trajectories for minimum radiation loss is derived analytically, and numerical optimization is used to find ideal trajectory parameters. Three-dimensional finite-difference time-domain simulations predict bend losses below 0.1 dB for 180 degrees-bends of overmoded silicon-on-insulator waveguides with a radius of R = 1.5 mu m. These findings are supported experimentally.